At 2007-10-24 17:56 +0100, James Cummings wrote:
I'm sure this is easy to do in XSLT2 but I've just not got my head
wrapped around how to compare things properly in an efficient manner.
Below is a working solution ... and then I log on to find that Mike
has already given it to you! It turns out I ended up doing a
serialization as a hash ... I sorted the attributes in the hash to
ensure the serialization would be consistent.
Ah well, I hope the code below is of some little help anyway.
. . . . . . . . . . . Ken
t:\ftemp>type cummings.xml
<entry xml:id="let22-w27">
<form>
<orth type="hw">the</orth>
<form type="orthVar">
<orth xml:id="w72">The</orth>
<orth xml:id="w3955">The</orth>
<orth xml:id="w4513">The</orth>
<orth xml:id="w4578">The</orth>
<orth xml:id="w4650">The</orth>
<orth xml:id="w4672">The</orth>
<orth xml:id="w4703">The</orth>
<orth xml:id="w4824">The</orth>
<orth xml:id="w4830">The</orth>
<orth xml:id="w2045">the</orth>
<orth xml:id="w2079">the</orth>
<orth xml:id="w2101">the</orth>
<orth xml:id="w2112">the</orth>
<orth xml:id="w2333">the</orth>
<orth xml:id="w2400">the</orth>
<orth xml:id="w2442">the</orth>
<orth xml:id="w1402">T<ex>h</ex><hi rend="sup">e</hi></orth>
<orth xml:id="w2422">T<ex>h</ex><hi rend="sup">e</hi></orth>
<orth xml:id="w6458">T<ex>h</ex><hi rend="sup">e</hi></orth>
<orth xml:id="w7822">T<ex>h</ex><hi rend="sup">e</hi></orth>
<orth xml:id="w2097">t<ex>h</ex><hi rend="sup">e</hi></orth>
<orth xml:id="w2155">t<ex>h</ex><hi rend="sup">e</hi></orth>
<orth xml:id="w2482">t<ex>h</ex><hi rend="sup">e</hi></orth>
<orth xml:id="w5887">t<ex>h</ex><hi rend="sup">e</hi></orth>
<orth xml:id="w5642">T<ex>h</ex>e</orth>
<orth xml:id="w5378">t<ex>h</ex>e</orth>
</form>
</form>
</entry>
t:\ftemp>type cummings.xsl
<?xml version="1.0" encoding="US-ASCII"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:xsd="http://www.w3.org/2001/XMLSchema";
xmlns:c="urn:x-cummings"
exclude-result-prefixes="xsd c"
version="2.0">
<xsl:template match="/">
<xsl:variable name="filename"
select="tokenize(document-uri(.),'/')[last()]"/>
<xsl:variable name="id-base" select="entry/@xml:id"/>
<div>
<xsl:apply-templates/>
<div type="links">
<linkGrp xml:id="{/*/@xml:id}-lg">
<xsl:for-each-group select="entry/form/form/orth"
group-by="c:deep-structure-hash(.)">
<xsl:text>
</xsl:text>
<link>
<xsl:attribute name="targets">
<xsl:text/>#<xsl:value-of select="$id-base"/>-v<xsl:text/>
<xsl:number format="A" value="position()"/>
<xsl:for-each select="current-group()">
<xsl:text> </xsl:text>
<xsl:value-of select="concat($filename,'#',@xml:id)"/>
</xsl:for-each>
</xsl:attribute>
</link>
</xsl:for-each-group>
</linkGrp>
<xsl:text>
</xsl:text>
</div>
</div>
</xsl:template>
<xsl:template match="form[(_at_)type='orthVar']">
<xsl:variable name="id-base" select="ancestor::entry/@xml:id"/>
<form n="{count(distinct-values(orth))}">
<xsl:copy-of select="@*"/>
<xsl:for-each-group select="orth"
group-by="c:deep-structure-hash(.)">
<xsl:text>
</xsl:text>
<orth>
<xsl:attribute name="xml:id">
<xsl:value-of select="$id-base"/>-v<xsl:text/>
<xsl:number format="A" value="position()"/>
</xsl:attribute>
<xsl:apply-templates/>
</orth>
</xsl:for-each-group>
<xsl:text>
</xsl:text>
</form>
</xsl:template>
<xsl:function name="c:deep-structure-hash">
<!--create a hash based on the structure of the element's descendants-->
<xsl:param name="node"/>
<xsl:variable name="return">
<xsl:apply-templates select="$node/node()" mode="c:deep-structure-hash"/>
</xsl:variable>
<!--return the hash as a string value-->
<xsl:sequence select="string($return)"/>
</xsl:function>
<!--mimic markup in the creation of the deep hash-->
<xsl:template mode="c:deep-structure-hash" match="*">
<xsl:value-of select="concat('<',name(.))"/>
<xsl:for-each select="@*">
<xsl:sort select="name(.)"/>
<xsl:value-of select="concat(' ',name(.),'="',.,'"')"/>
<xsl:text>></xsl:text>
</xsl:for-each>
<xsl:apply-templates mode="c:deep-structure-hash"/>
<xsl:value-of select="concat('</',name(.),'>')"/>
</xsl:template>
<xsl:template match="@*|*"><!--identity for all other nodes-->
<xsl:copy>
<xsl:apply-templates select="@*|node()"/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
t:\ftemp>call xslt2 cummings.xml cummings.xsl cummings.out
t:\ftemp>type cummings.out
<?xml version="1.0" encoding="UTF-8"?><div><entry xml:id="let22-w27">
<form>
<orth type="hw">the</orth>
<form n="2" type="orthVar">
<orth xml:id="let22-w27-vA">The</orth>
<orth xml:id="let22-w27-vB">the</orth>
<orth xml:id="let22-w27-vC">T<ex>h</ex><hi rend="sup">e</hi></orth>
<orth xml:id="let22-w27-vD">t<ex>h</ex><hi rend="sup">e</hi></orth>
<orth xml:id="let22-w27-vE">T<ex>h</ex>e</orth>
<orth xml:id="let22-w27-vF">t<ex>h</ex>e</orth>
</form>
</form>
</entry><div type="links"><linkGrp xml:id="let22-w27-lg">
<link targets="#let22-w27-vA cummings.xml#w72
cummings.xml#w3955 cummings.xml#w4513 cummings.xml#w4578
cummings.xml#w4650 cummings.xml#w4672 cummings.xml#w4703
cummings.xml#w4824 cummings.xml#w4830"/>
<link targets="#let22-w27-vB cummings.xml#w2045
cummings.xml#w2079 cummings.xml#w2101 cummings.xml#w2112
cummings.xml#w2333 cummings.xml#w2400 cummings.xml#w2442"/>
<link targets="#let22-w27-vC cummings.xml#w1402
cummings.xml#w2422 cummings.xml#w6458 cummings.xml#w7822"/>
<link targets="#let22-w27-vD cummings.xml#w2097
cummings.xml#w2155 cummings.xml#w2482 cummings.xml#w5887"/>
<link targets="#let22-w27-vE cummings.xml#w5642"/>
<link targets="#let22-w27-vF cummings.xml#w5378"/></linkGrp>
</div></div>
t:\ftemp>rem Done!
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